What to Wear on a Hot Summer Day: Easy Summer Outfit Ideas for Girls
Australian summer has a very specific dress code: cool, comfortable and ready for anything.
One minute she’s at the park, the next she’s asking to get in the pool, and somehow there’s a birthday party at 2pm. The best girls’ summer clothes need to keep up without requiring seventeen outfit changes (although she may have other ideas).
So what should girls wear when it’s hot?
Start with lightweight, breathable fabrics, comfortable shapes that allow plenty of movement, and simple outfits that can take her from playtime to wherever the day ends up.
Here are our favourite easy summer outfit ideas for girls, from breezy cotton dresses to swimwear and the all-important sun hat.
1. A Cotton Summer Dress
There’s a reason a great summer dress gets worn approximately 400 times before February.
For hot weather, look for lightweight cotton, comfortable armholes and a shape that doesn’t cling to the body. A dress with a little room through the skirt also gives kids the freedom to run, climb and cartwheel without feeling restricted.
Cotton is particularly good for everyday summer dressing because it’s breathable, comfortable against the skin and easy to wear.
For casual days, pair a cotton dress with sandals or sneakers and always a sun hat. Add a cardigan when the temperature drops later and you’ve covered most of the Australian summer calendar.
2. A Tee and Shorts for Serious Playing - and Have You Considered a Jumpsuit/Playsuit?
Some days call for maximum cartwheel capacity.
A soft cotton tee and comfortable shorts are an easy choice for playgrounds, daycare, holidays and days spent tearing around outside.
The trick is keeping both pieces lightweight and avoiding overly complicated fits. Summer clothes should be easy to move in, easy to layer and, ideally, easy for kids to get on and off themselves.
Choose a colourful printed tee when the shorts are simple, or let a fabulous pair of printed shorts do the talking.
Have you considered a playsuit or jumpsuit? That can also help take the guesswork out of outfits and ours zip right through the front for big girls who want to do it themselves, mum.
Shop Girls’ Tees →
Shop Girls’ Shorts →
Shop Girls’ Playsuits & Jumpsuits
3. Swimwear That IS the Outfit, Not Just Hiding Under It
If swimming is even remotely possible, start there.
A swimsuit worn under shorts, a skirt or a light summer dress saves the inevitable changing-room wrangle later. It’s especially useful for beach holidays, pool days, splash parks and those suspiciously quiet afternoons when somebody eventually asks, “Can we get the hose out?”
A one-piece swimsuit can also work almost like a bodysuit with shorts or a skirt over the top, making the transition from swimming to lunch much easier.
Add a hat, sandals and a lightweight cover-up and she’s ready to go.
4. A Fancy Summer Dress for Parties
A birthday party on a 32-degree day is not the occasion for an elaborate outfit with six layers and a dream.
Look for a cotton party dress with a comfortable fit and plenty of movement. Bright prints and interesting details can make a dress feel special without making it heavy or fussy.
The bonus? A well-designed party dress shouldn’t be limited to parties.
Swap party shoes for sneakers or sandals and the same dress can head to lunch, holidays or the playground.
5. Wide-Leg Pants for Cooler Summer Days
Not every summer day is scorching, particularly once the sun disappears.
Lightweight wide-leg pants with a cotton tee are useful for cooler mornings, breezy evenings, travel days and holidays when you need something between shorts and winter clothes.
A relaxed leg allows more airflow than a tight-fitting pant and gives kids plenty of room to move.
Add a tee during the day and keep a light cardigan handy for later.
Bonus Points: Oobi’s pants have REAL pockets! Your little one will love that!
6. The Summer Hat That Lives by the Front Door
The best summer outfit is the one with a hat.
For everyday wear, choose a wide-brim or bucket-style sun hat that provides useful coverage and is comfortable enough that she’ll actually keep it on.
And yes, “actually keep it on” is doing some heavy lifting there.
A ponytail hat is particularly handy on holidays or windy days because she can ride her hair up high and not have it bunching inside a hat. Win!
7. An Easy Throw-On Outfit for the Beach
Beach dressing should be gloriously uncomplicated.
Start with swimwear, then add an easy cotton dress or loose tee and shorts over the top. Finish with a sun hat and shoes that can cope with sand.
That’s it.
The ideal beach outfit is easy to take off, easy to put back on and doesn’t matter if a small amount of the beach comes home inside it.
For holidays, pieces that can be mixed and matched are even better. The dress she wears over her swimmers can become tomorrow night’s dinner outfit with a change of shoes.
8. Matching Mum and Me Outfits for Summer Days
Matching outfits are particularly fun in summer because they don’t have to be overly styled.
A mum and daughter matching dress, coordinated print or matching accessory does most of the work for you. Add sandals and you’re done.
They’re lovely for holidays, family lunches, birthdays and photos, but our favourite matching looks are the ones that still feel relaxed enough for an ordinary summer day.
Because coordinating with your tiny bestie is fun. Dressing like you’re about to perform a family musical number is optional.
Shop Mum & Me Matching Outfits →
What Fabrics Are Best for Girls in Hot Weather?
For everyday summer clothing, natural, breathable fabrics such as cotton are an excellent choice.
Cotton absorbs moisture and allows air to move through the fabric, which can make it more comfortable in warm conditions. Fabric weight matters too. A lightweight cotton will generally feel cooler than a thick, heavy fabric, regardless of fibre.
Fit is equally important.
Loose or comfortably fitted clothes allow more air circulation around the body than very tight clothing. For active kids, a little extra room also makes running, climbing and playing considerably easier.
At Oobi, we’ve been designing children’s clothing for more than 20 years, so fit isn’t an afterthought. We design for real kids doing real-kid things, including the apparently irresistible urge to hang upside down from playground equipment.
Our Simple Formula for Dressing Girls in Summer
When the forecast starts climbing, keep it simple:
Choose breathable fabrics + an easy shape + plenty of movement + a sun hat.
For swimming days, add swimwear underneath.
For cooler mornings or evenings, bring one lightweight layer rather than dressing too warmly from the start.
And whenever possible, choose pieces that can do more than one job. A dress that works at the playground and a birthday party, swimmers that double as a top, or shorts that work with half the tees in her wardrobe make summer dressing considerably easier.
Girls’ Summer Outfit FAQs
What should a girl wear on a very hot summer day?
Choose lightweight, breathable clothing with a comfortable, non-restrictive fit. A cotton summer dress, loose tee and shorts, or swimwear with a lightweight cover-up are easy options. Add an appropriate sun hat when spending time outdoors.
Is cotton good for kids in hot weather?
Cotton is a popular choice for summer because it is breathable, absorbent and comfortable against the skin. Lightweight cotton fabrics are particularly useful for hot-weather clothing.
Are dresses cooler than shorts in summer?
They can be. A loose-fitting cotton dress allows air to circulate around the body and doesn't have a waistband or separate layers around the torso. The fabric, weight and fit of the garment matter more than whether it is technically a dress or separates.
What should kids wear over swimmers?
A lightweight cotton dress is one of the easiest options because it can be pulled on quickly and worn to lunch, the shops or home from the beach. Loose tees and shorts also work well. Look for clothes that are comfortable over slightly damp swimwear and easy to change out of.
What should girls wear to a summer birthday party?
A lightweight cotton dress is an easy option for a hot-weather birthday party. Look for a comfortable fit with enough room for running and playing. A colourful print or special detail can make the outfit feel party-ready without adding heavy layers.
What clothes should I pack for a girls’ summer holiday?
Start with pieces that can be mixed and matched: a few lightweight dresses, cotton tees, shorts, swimwear, a sun hat, comfortable shoes and one light layer for cooler evenings. Choose pieces that can serve more than one purpose to avoid overpacking.
Ready for Summer?
From cotton summer dresses and colourful separates to swimwear, sun hats and matching mum-and-me outfits, the best summer wardrobe is one she can actually live in.
Comfortable enough for ordinary Tuesdays. Fun enough for birthday parties. And ready for a swim at approximately seven seconds’ notice.
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